Astro [email protected] — Release Notes & Engineering Impact

Source available — automated, not human-reviewed

Component: astro · Channel: stable. Automated analysis, not a compatibility certification. How this works.

Analysis updated: 2026-10-31.

Compatibility not verified — check source notes

$ npm install --save-exact [email protected]

📄 .MD

🔧 Bug Fixes 6

⚡ Executive Summary (TL;DR)

Astro [email protected]. Source highlight: Preserves the last modified date of cached optimized images and incrementally restored build output when copying them into the build output on all platforms

Visit Astro Official Site ↗ Official Release Source ↗ All Astro Releases 📡 Astro RSS

Who Does This Impact? (Role-Based Analysis)

💻 Software Engineers & Devs

Check the source notes against the package and APIs you use before upgrading.

📊 Product & Engineering Leads

Use the documented changes to assess relevance to your product; release frequency alone is not a quality measure.

⚙️ DevOps & Security

Verify the target version, runtime requirements and rollback procedure in the official documentation.

🔧 Bug Fixes & Patches (6)

Preserves the last modified date of cached optimized images and incrementally restored build output when copying them into the build output on all platforms
Fixes a typo in the error message shown when a font `cssVariable` is invalid
Fixes a bug where projects whose path contains an apostrophe (`'`) failed to load sessions, middleware, a cache provider, or a `src/fetch.ts` handler
Fixes a `TSCONFIG_ERROR` during `astro build` when a parent directory contains a `tsconfig.json` that cannot be resolved, such as one extending `astro/tsconfigs/strict` without installed dependencies
Fixes an `Unterminated string` build error when application code imports from `astro/config` (for example, `fontProviders` in a shared fonts module)
Fixes missing styles in production builds for conditionally rendered framework components (e.g. Svelte components inside `{#if}` blocks) imported by a hydrated island

📄 View Raw Release Notes (Original Developer Log)

### Patch Changes - [#18425](https://github.com/withastro/astro/pull/18425) [`6fdc36e`](https://github.com/withastro/astro/commit/6fdc36ed97316d932d2e143b85739f0af37ab329) Thanks [@astro-factory](https://github.com/apps/astro-factory)! - Preserves the last modified date of cached optimized images and incrementally restored build output when copying them into the build output on all platforms - [#18419](https://github.com/withastro/astro/pull/18419) [`395d195`](https://github.com/withastro/astro/commit/395d19525986a276bf81af7bd365e7a35dc20ef3) Thanks [@astro-factory](https://github.com/apps/astro-factory)! - Fixes a typo in the error message shown when a font `cssVariable` is invalid - [#18401](https://github.com/withastro/astro/pull/18401) [`484822f`](https://github.com/withastro/astro/commit/484822fbba652745c4f2da5ef434a350203578e2) Thanks [@danielmlr](https://github.com/danielmlr)! - Fixes a bug where projects whose path contains an apostrophe (`'`) failed to load sessions, middleware, a cache provider, or a `src/fetch.ts` handler - [#18407](https://github.com/withastro/astro/pull/18407) [`a6e00be`](https://github.com/withastro/astro/commit/a6e00beae6c134d0c1b5248eb02fbf119b7d64e9) Thanks [@astro-factory](https://github.com/apps/astro-factory)! - Fixes a `TSCONFIG_ERROR` during `astro build` when a parent directory contains a `tsconfig.json` that cannot be resolved, such as one extending `astro/tsconfigs/strict` without installed dependencies - [#18427](https://github.com/withastro/astro/pull/18427) [`908f167`](https://github.com/withastro/astro/commit/908f1672a9fe6c40e6b73bfb0307f0d1f3ac2057) Thanks [@astro-factory](https://github.com/apps/astro-factory)! - Fixes an `Unterminated string` build error when application code imports from `astro/config` (for example, `fontProviders` in a shared fonts module) - [#18428](https://github.com/withastro/astro/pull/18428) [`40e7d54`](https://github.com/withastro/astro/commit/40e7d54c7f969b402f011d32ccd87123835d0aa1) Thanks [@astro-factory](https://github.com/apps/astro-factory)! - Fixes missing styles in production builds for conditionally rendered framework components (e.g. Svelte components inside `{#if}` blocks) imported by a hydrated island - [#18424](https://github.com/withastro/astro/pull/18424) [`617ff59`](https://github.com/withastro/astro/commit/617ff59820b4a5777eb5d3765c09d29082b11acc) Thanks [@astro-factory](https://github.com/apps/astro-factory)! - Fixes style-only HMR in `.astro` components falling back to a full page reload when a PostCSS plugin (such as `@unocss/postcss`) lists the component as a dependency of its own style - [#18274](https://github.com/withastro/astro/pull/18274) [`70834bb`](https://github.com/withastro/astro/commit/70834bbea43695c563358ea055d32ecb5e0a78dd) Thanks [@Princesseuh](https://github.com/Princesseuh)! - Fixes increasing memory usage when editing the Astro configuration while the dev server is running

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